First slide

Classification of Animals

Question

Which of the following is true regarding Nereis, Pheretima and Hirudinaria?

Moderate

A

Hirudinaria is aquatic whereas the other two are terrestrial.
B

Pheretima has setae which are absent in the other two.
C

Nereis is dioecious whereas the other two are monoecious.
D

Hirudinaria lacks parapodia which are present in the other two.

Solution

Nereis is dioecious, but earthworms and leeches are monoecious. Nereis and Hirudinaria are aquatic, but earthworms are terrestrial. Setae are present in Nereis and Pheretima but absent in leeches. Parapodia are present in Nereis but absent in earthworms and leeches.

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